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Diffusion plasma-assisted chemical treatment apparatus

  • US 5,105,761 A
  • Filed: 10/15/1990
  • Issued: 04/21/1992
  • Est. Priority Date: 10/19/1989
  • Status: Expired due to Fees
First Claim
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1. Diffusion plasma-assisted chemical treatment apparatus incorporating a tight treatment enclosure (12) having an axis of symmetry (18), axial production means (20, 22) for a plasma of a carrier gas in the enclosure, at least one continuous solid plate (30) serving as an obstacle to the plasma and positioned perpendicular to the axis (18) and downstream of the production means, plasma diffusion means (40) located downstream of the plate (30) in the enclosure, several non-ionized vector gas supply tubes (50) issuing axially into the enclosure, beneath the diffusion means (40), the ends (52) of said tubes issuing into the enclosure being in the same plane around the enclosure axis and being arranged to provide a delocalized distribution of vector gas, at least one substrate carrier (56) located in the enclosure downstream of the supply tubes and perpendicular to the enclosure axis and annular, axial pumping means (16, 64, 66) for the gaseous medium contained in the enclosure and positioned downstream of the substrate carrier.

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